It is okay to be one tricky pony?
What are the advantages and the bad points? Beeing OTP means that you play the same champion no matter what role?
What are the advantages and the bad points? Beeing OTP means that you play the same champion no matter what role?
It's perfectly viable, and some people would even encourage it because you learn a lot of aspects of the game without having to adjust much. If you play 2k games with Renekton, chances are you know the matchups for Renekton, how to play them, what to do at all stages of the game, and most important you'll know when you can take fights in each of these matchups.
The downside is in higher elo, and this isn't super relevant until like master tier and above, people will scout to see if you're in a game, and will ban your one trick. I see it all the time with players like Romanium for Renekton, iPav for Teemo, SSBM Hax for Twisted Fate. You get the picture.
Until then as long as you don't pick a top ban champion as your one trick you'll probably be fine. So don't one trick Mundo or Kindred, or one of those champions.
Difficult and dangerous, with potentially big rewards and big frustrations.
If you pick just one champion to stick with, you'll master their abilities, item builds, matchups, runes/masteries, and successful mid-late game patterns to the point where you will start to naturally rise in rank as long as you consistently get your champion. Most other players will be picking from multiple champions in each lane to fill out their 'pool' and try to pick a champ that fits the match well by filling out their team comp or giving them a strong lane matchup.
By default, they will almost certainly have less experience with their champion than you will have with yours (after you've stuck with your one trick for a while of course).
You will find yourself out trading them because they don't understand all the various tricks your champion can pull off to come out ahead, you will kill them when they don't expect it because they only had a rough estimate of your power spike timing and exactly how much damage you can do but you will have learned that, for example, if you come to lane at level 9 with x item and the enemy isn't a tank you can instantly flash ult combo ignite them to kill squishy champs who have y health or less from 100-0. You will get away from more ganks and survive many more situations that feel like certain death because you will have alot of little tricks ready where any one of them could see you to safety if the enemy doesn't stop them. You will perform your job better in teamfights and in mid game map moves then the other champs because you have a very clear understanding of when you are going to hit your strongest and weakest points over the course of the game, and how to change your play accordingly while other players struggle to keep trying the same things when their power level shifts.
So, you will rise to the point where you, on your one champ, are at an even skill level with everyone else... but heres the thing: everyone else will be performing at the same level a you except they can do that with multiple champs.. which means that you're going to start getting a lot of counter matchups and team comps built against you except unlike before you won't have the performance edge against them. This is where you will level out unless you can master your champ to the extent that you can consistently take down people who actively trying to counter you, and have the knowledge and ability to do so, at a significantly high level of execution.
This is the best case scenario where you get the time to play many many games without the meta shifting to screw you over. At any time an item can be added or changed or certain champs can come into or leave the meta and the result could make your champion much harder to play successfully. You could play a champ like kha six or akali when leesin suddenly becomes strong and have to deal with his built in stealth reveal and ability to instantly kick you off of any target you jump on for example. In such a meta, you'll probably not be climbing and may even start falling unless you hit up the normal and custom games and actually do some training specifically to be able to handle these shifts in the meta. On the upside if you stick through and the meta shifts again to something more favorable for you, it's like you went through the hyperbolic time chamber and have returned much stronger.
The 3 biggest dangers of being a one trick are:
OTP means that you main one champion in one role and thats what you can do but nothing else.
for example, i play jungle and my main champions are volibear and shyvana and even tho this isnt exactly ONE trick, its still relatively limited and in a teamgame, if the enemy team bans or picks these champions i have some trouble.
Good: You can climb really quickly in rank because you can master one champion relatively very quickly.
Bad: Once you get to a high rank you are stuck playing only that champion because you are bad with every other champion. You also only have a particular skill set of knowledge, preventing you from helping others with champions except your one-trick.
One trick pony is a good strategy to climb quickly and it becomes an art form mastering One champion. Onpy bad thing is you are trash when that role or champ is taken/banned.
A one trick pony is just a big old phony.
you should be capable of doing the following in ranked:
OTP is generally not a great idea, i have a buddy who does this, he is pretty bad at this game but only plays xin zhoa and manages to do well with him because well its the only thing he plays. But then the opponent picks it or i gets banned nd he goes 0/99/0
. . .
Anyway if you are going to be a onetrick pony at least do it on a usefull champion like bard or malphite. Becasue no matter the meta champions with utility are always good.
Lets take my example of that friend who plays xin only, guess what will happen once devourer gets nrefed or removed or has a weird counter to it all of a sudden.
It won't make you a pro, but you'll generally do well.
I love being a one trick pony :3
With the upcoming changes to ranked, being a one trick pony (or more specifically, a two trick pony) is about to become way more viable. Realistically, if you learn 4 champions that can be played in two positions then you can never be banned out and you will always get one of your two positions.
Bein a One Trick Pony won't be a problem as long as you are one tricky pony. 
Sure, why not. Practicing one punch 10000 times > practicing 10000 punches once.
Usually champs that can fulfill more than one position are usually the best things to one-trick, so that's more filling flexibility for you. (though go ahead and be "mid only", no one's stopping you) Preferably something that can fit into as many comps as possible. Against "countered" matchups? If you can one trick you would eventually know how to deal with those.
Though the bad part is, obviously, when your main is banned/taken. Which means it's a good idea to have a backup plan. Trolls will obviously go edgelord mode and ban your main, if you one-trick something popular or something that's a common ban expect your main to be gone, and so on.
And yes, being OTP really means that, though some champs have very different playstyles depending on where they go. For example, Lulu mid/top gameplay is drastically different from Lulu support.
Speaking of Lulu support, that's pretty much what I only play. Raka and Sona are my backups, and if support is somehow taken (it rarely happens, like 1/30 games or something), then I just fill and feed like a madman and hope that my team does something since they called that role.
It's fine, but you need some backups that you play almost as well, if not AS well, as your main.
Ex. I am a Bard main, but when that is a bad idea (or Bard/Support is taken) I run Zyra in mid/support/jungle, Zilean mid/support, trundle top/support, and Heimerdinger top/mid
imo OTP isn't that great but say like 2-3 champs is fine, because if you can only play 1 champion and it gets picked/banned you're screwed so if you have 2 other picks that you're at least good enough with along with your one trick you should be fine.
I thought being an OTP is that you relied on one mechanic religiously. Like Blitzcrank hook.
It's risky.
There are just some champions that can't succeed in certain roles, and certain lane match-ups. But, there are some who can.
Darius, for example, is from what I've heard a decent counterpick against assassins in the midlane, but will feed against mages who can kite him (anyone with slows or mobility, essentially).
If your "support" Rengar doesn't get some early cheese kills, you're not contributing much to the team. A support mummy, however, brings a lot more to the table without needing AP to do their job.
It's risky, and honestly I wouldn't recommend it. I'd recommend keeping your pool at a manageable size, though, to stay somewhat specialized.
Once you get to diamond I do believe people will just ban your champion if they know your on and since you can't play anything else you either dodge or lose. At least that's my understanding.